A collection of devices that includes the tubing and other items [e.g., connectors, stopcock(s), clamps and filters] intended to be used as an external connection for the invasive measurement of urethral and related urological pressures. This set will interface, either directly or from an intermediate stopcock, between the applied invasive catheter and the measuring transducer. It will have physical characteristics appropriate for preserving, to the extent possible, the waveform and fidelity of the measured pressure. This is a single-use device.